unable to use imnoise ,imcrop in my coding

I need to apply some noise on my image using 'imnoise' .But error message is apearing as 'Undefined function or variable 'imnoise' '

I will attach my code and image here.

and also tried imcrop, and template_matching.but the same error occured

Could you please explain the reason for this.

Thanks in advance

[Mathieu NOE]

you need the Image Processing Toolbox.

[Milani Tharuka]

Thank you so much for the reply.I am using Matlab R2016a. could you plese send me a download link for trial version of Image processing toolbox which compatible to use with my version.

[Walter Roberson]

MATLAB R2016a is no longer sold, so you cannot get a trial version of it for new purchases.